Hi All, Have a 1998 Mira L500 649cc DOHC, the problem is the engine is running to cool, the temp gauge is around 1/4 inch above the bottem mark on the temp gauge,and then rises to just under half way when going up hill, if i go down hill on the over run the temp gauge goes to just above the cold mark, i have changed the thermostat with a new one and the problem is exactly the same, the heater also only blows cool air when near the cool mark, and very hot when half way on the temp gauge going up hill, with a new thermostat fitted you would think the temp gauge would stay in the half way mark and heater stay hot, any ideas please, Cheers